Stove structure



' Oct. 1, 1929. v Y J. IRONSIDE 1,730,008

STOVE STRUCTURE Filed July 12, 1928 2 Shet's-Sheet l INVENTOR.

how/0e A TTORNE Y.

Oct. 1,. 1929. J. IRONSIDE 1,730,008

STOVE STRUCTURE Filed July 12, 1928 2 Sheets-Sheet 2 INVENTOR. firm: [Poms/05 A TTORNE Y.

Patented Oct. 1, 1929 wees JAMES IBONSIDE, OF DETROIT, MICHIGAN, ASSIGNOR TO CLAYTON & LAMBERT MANU- FACTURING 00., 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN STOVE STRUCTURE Application filed July 12,

structure and manner of fabricating the same.

Heretofore in stove structure, and particularly in collapsible or foldable camp stoves, much difficulty has been encountered in the design and fabrication of suitable grate structure. Cast grate structures have presented many drawbacks, and steel or other metallic grate structures whether stamped or assembled have presented difficulties mainly due to the relative expansion of the various parts.

It is the object of the present invention to provide a grate structure which is assembled in a novel manner from various metallic elements, the various parts of the grate being so formed and so secured as to permit relative expansion of one or a plurality of parts due to localized heat without binding or detrimentally affecting the other parts of the grate. 1 p

More specifically, the grate structure is preferably formed of a plurality of separate metallic rods connected together with sheet metal end bars, the connection between the said rods and end bars being obtained in a novel manner, and all of said rods being secured at one end to one of the end bars but only two of said rods being secured at the other end to the other end bar. With this structure the distance between the end bars is determined by the two rod members which are secured at each end to the respective end bars, and any excessive expansion of any other rod is taken care of by the free connection between one end of the rods and one of the end bars.

Other features of the present invention involve the novel arrangement of the grate structure in combination with the particular type of stove structure shown together with the manner of pivoting and positioning the grate structure in the stove.

In the drawings:

Fig. 1 is a plan view of one type of stove structure embodying the present invention, showing in particular the manner of securing the various elements of the grate structure together, and the manner of pivoting 1928. Serial No. 292,118.

the grate structure as a unit to the rear wall of the stove casing.

Fig. 2 is a detail side elevation of the grate structure.

Fig. 3 is a sectional View taken on line 3-3 showing the preferred manner of fabricating the outer end bar for receiving the rods.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 1* a a Fig. 5 is a fragmentary perspective view of the preferred form of the inner end bar before fabrication.

Fig. 6 is a perspective View of the same end bar after the same has been formed.

Fig. 7 is a view similar to Fig. 5 but showing the outer end bar before fabrication.

Fig. 8 is a perspective view showin the outer end bar in the preferred finished orm.

The grate structure of the present invention is particularly adapted to be used with foldable camp stoves wherein the grate is preferably pivotally mounted to some portion of the stove casing. In Fig. 1 I have shown the grate structure of the present invention in combination with a novel stove structure but it will be understood that such grate structure may be utilized in connection withvarious typesof camp stoves.

As best shown in Fig. 1, the grate consists of the end rods 1 and 2, the pivot rods 3 and 4 and the central rods 5. The end rods 1 and 2 are adapted to be'spot welded at each end, as at 6 and 7 to suitable end bars 8 and 9, the bar 8 being designated the inner end bar, and the bar 9 the outer end bar.

Each of the rods makingup the grate unit are preferably spot welded at their outer ends to the outer bar- 9, as best shown in Fig. 1. It will be obvious thatvit is not necessary to weld all of these rods, and it will alsobe obvious that they'niay be secured by various ways to the end rod, such as by clamping or otherwise, but in the preferred form of the present construction in order to obtain an extremely compact and serviceable but ineX- pensive grate structure, I preferably spot weld each rod to the end bar.

Rods 3, a'and. 5 preferably extend through the U-shaped inner bar 8, and have a free fit therewith whereby any change of the rods due to expansion from heat will not afiect the bar 8. The rods 1 and 2 are therefore the only rods which are rigidly connected to the inner bar 8.

The rods 3 and 4 preferably freely extend through the inner bar 8 and are then bent at right angles and fabricated as at 10, (see Figs. 2 and 4) whereby to constitute pivot members 'for the grate unit, to permit the same to be swung up out of normal position. The back wall 11 of the casing is preferably bent 180 degrees at the top, as at 12, and then outwardly to form the flange 13', such flange being apertured, as at 14 and 15 to receive the ends 10 of the rods 3 and 4. This flange 12 and 13 at the top not only provides, a pivot for the rods 3 and 4, and a rest for of the grate unit.

In fabricating the grate unit I preferably utilize a flat strip 16 such as shown in Fig. 5, which is apertured, as at 17, and which apertures are spaced to receive the various rods forming the grate. This flat strip 16 may then be bent into a U-shape, as shown in Fig. 6, the portions 18 adjacent the apertures being-preferably formed as best shown in Fig. 6. Such fiat strip 16 may be formed as a unit or may be formed and pressed into shape while the various rods are positioned through the apertures. It will also be understood that theside walls of this U-shaped end bar 8 may be perfectly fiat if desired.

The other end bar 9 is also preferably formed-from a flat strip such as shown at 19 in Fig. 7, and'in forming this end bar all the rods are preferably positioned and spaced as desired, and the side walls 20 and 21 of the end bar then simultaneously turned up and pressed into shape around the rods. In Fig. 8 I have shown the end bar 9 as being formed as a separate unit, but this is for illustration only and it will be understood that such end bar may be formed either as a unit or preferably with the-rods initially positioned in place. In addition to the rods being clamped into place in the end bar they are also preferably spot welded, as clearly shown in Fig. 1.

In the particular stove structure illustrated I have shown a two burner unit comprising the burners 23 and 24 connected by a suitable manifold 25 and provided with a mixing chamber 26 having the pivotally mounted valve member 27 for permitting reciprocation through the mixing chamber of'the generator tube 28. This pivot-ally mounted valve member 27 is adapted to be vertically moved upon inward movement -of the generator member 28, and for this reason the centrally positioned rods 29 are each formed with lateral projecting portions 30 to permit of such upward movement of the valve member 27.

In operation, the flanges 13 and 15 are of such width as to permit of a small play between the end bar 9 and the wall casing, and between the opposite end of the rods and the back wall 11 of the casing. lVith the stove in operation it will be obvious that some of the rods will be heated to a more or less degree whereby to cause longitudinal expansion of the same. The rods 1 and 2 being at the end and only slightly heated willserve to maintain the spacing of the end bars 8 and 9, and while such rods 1 and 2 may slightly expand there will "be plenty of room for such expansion of the end bars. If several of the rods become highly heated, or even if only one of the rods becomes heated, it will be obvious that the change in the length of such rod. due to such expansion, will be taken care of by reason of the free fit between the end rod and the end bar 8.

While the frame of the grate, consisting of the end bars 8 and 9 and the end rods 1 and 2, may be moved forwardly as a unit after the rods 3 and 4; become heated, such movement will also be taken care of by the play between the end bar 9 and the stove casing. Expansion of the other rods 5 will. be generally taken care of by their free move ment through the end bar 8. With this construction it will be seen that I have made it possible to maintain the integrally connected parts of the grate as a unitary parallelogram structure and to permit movement of the other rods so as to prevent any binding of the grate structure.

What I claim is:

1. Grate structure for stoves, comprising end members defining the limits of the grate and rigidly connected together, and other members positioned interiorly'of said end members and rigidly secured at one end to the grate structure and positioned by but freely movable with relation to the grate structure at their other ends.

2. Grate structure for stoves, comprising end members defining the limits of the grate and rigidly connected together, and other members positioned interiorly of said end members and rigidly secured at one end to the grate structure and positioned by but freely movable with relation to the grate structure at their other ends, the ends of two of said freely movable members forming pivots for connection with the stove casing to permit pivotal movement of the grate as a unit therewith.

3. Grate structure for stoves, comprising a plurality of independent rod members cooperating with two end bars, two of said rod members being rigidly connected at both ends to said end bars, one of said end bars being provided with apertures, and said other rod members extending through said apertures whereby to be freely movable with reference to said apertured end bar.

4. Grate structure for stoves, comprising a plurality of independent rod members cooperating with two end bars, two of said rod members being rigidly connected at both ends to said end bars, one of said end bars being provided with apertures, and said other rod members extending through said apertures whereby to be freely movable with reference to said apertured end bar, said last named rod members being rigidly connected at their outer ends to said other end bar.

5. Grate structure for stoves, comprising rod members and end members for holding said rod members in assembled position,'two

2 of said rod members being rigidly connected at their ends to said end members to form an integral unit, and two of said rods being connected at one end to one of said end bars and extending through said other end bar to form pivot members for pivotal connection with the stove casing.

6. Grate structure, comprising a plurality of rod members and two end members positioned transversely at the ends thereof, all of said rod members being rigidly secured at their outer ends to one of said end members, two of said rod members being rigidly secured at their inner end to said other'end member, and the rest of said rod members being positioned by and freely movable relative to said other end member.

7. Grate structure, comprising a plurality of rod members and two end members positioned transversely at the ends thereof, all 40 of said rod members being rigidly secured at their outer ends to one of said end members, two of said rod members being rigidly secured at their inner end to said other end member, and the rest of said rod members being positioned by and freely movable relative to said other end member, two of said last named rod members extending beyond the other rod members to form pivots for pivoting of the grate as a unit.

8. Stove construction, comprising in combination a stove casing having one wall thereof bent to form a double edge at the top, a portion of said double edge extending laterally to form a flange, a grate member consisting of a plurality of rods secured together by end members, a portion of the rod being secured at both ends to both of said end members, and two of the rods extending through the inner end members and being freely movable therewith, said last named rods being adapted to cooperate with said flange to form a pivot for said grate.

In testimony whereof I affix my signature.

JAMES IRONSIDE. 

